The SV-318 was launched in january 1983, at the Winter CES show in Las Vegas, as the same time as the Spectravideo CompuMate, an keyboard add-on for the Atari 2600.
The Spectravideo SV-318 is the system at the origin of the MSX standard, and such, has characteristics very close to the MSX systems (same video, sprites, sound, I/O, etc.). It was even sold as an MSX computer in some places, but it is not fully MSX compliant and can't use MSX programs.
Notice that instead of using cursor keys, the Spectravideo uses a small joystick, which emulates cursor keys.
An "expansion base" addon was available. This provides 64 KB RAM, a 80 column video and a floppy disk controller and its floppy drive (5.25"). With all these peripherals, the SV318 can run under CP/M.
In 1984, Spectravideo released a revised version of the SV-318, named SV-318 MKII. The colour of area around the keyboard is different, but more importantly the motherboard has been redesigned, for production costs reason. Among the changes was a single ULA chip instead of several TTL chips, reducing the motherboard footprint and cost.
A more professional version of the SV318 was launched a while later: the SV-328 (which has 80 KB RAM and a numeric keyboard and the SV-728 case).
BUILT IN LANGUAGE
SV Extended Basic (by Microsoft)
71 keys, rubber keyboard with built-in joystick
TMS9918A graphics chip, and AY-3-8910 sound chip
16 KB (up to 144 KB), 12 KB free for programmation with Basic
40 x 24
256 x 192 in 16 colors / 64 x 48 in 16 colors
AY-3-8910 sound chip offering 3 channels and 8 octaves
video output, cartridge slot, expansion port, tape, joysticks (2)
CP/M optional with disk-drives
External power supply. 9V AC & 16V AC out
SVI-903 Data Cassette Recorder, SV-601 Super Expander, SV-602 Single Slot Expander, SV-902 Floppy Disk drive (external), SV-901 Dot Matrix Printer, SV-805 RS-232 Interface, SV-105 Graphic Touch Tablet, SV-803 16K RAM Pack, SV-807 64K RAM Pack, SV-802 Centronics Interface, SV-701 Smart Modem, SV-801 Dual Disk Drive Controller, SV-806 80-Column Display adapter, SV-603 Coleco Game Adapter, SV-101 Quickshot Joystick